Feeling alone.. and very pregnant

My boyfriend and I just found out we’re expecting and it’s a good thing for the most part. However he’s 31 and I’m 25 and this will be my 3rd baby after a mistake marriage and two beautiful children from that marriage. My family is very religious and I feel like if I tell someone then it’ll spread like wildfire. However I’m feeling very alone and a little scared. I share my kids so I won’t be too overwhelmed but I don’t want people to judge me. I’m not married to my boyfriend and he’s not a perfect guy but he’s someone I’m in love with. Who can I talk to about expecting and when should I tell my crazy family.. what if they don’t accept my new addition to the family and never talk to me again.